<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
  </head>
  <body>
    <script>
    let arr = [4,9,5,20,3,11]
    let sum = 0
    for (let i =0;i<arr.length;i++){
      if(arr[i]>5){
        sum += arr[i]
      }
    }
    document.write(`数组中大于5的所有数的和为${sum}`)
  </script>
  </body>
</html>